| Atomic Mass | 145 |
|---|---|
| Atomic Number | 61 |
| Name Origins | Greek, Prometheus, who stole fire from the gods. |
| Year Discovered | 1945 |
| Discovery Credits | Produced by J. A. Marinsky, L. E. Glendenin, and C. D. Coryell at Oak Ridge, Tennessee, USA. |
| Remarks | Radioactive metal of the lanthanide group. Used in specialized miniature batteries and radioactive tracers. |
| References | Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p. |
| See Also | WebElements, ChemiCool |
No Naturally Occurring Isotopes
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